Examples of steganography: Shrinking the secret text until it’s the
size of a dot and then putting it in an unsuspected place, such as the dot
on top of a letter i in some innocuous letter. Shaving the head of
a man, writing the secret message on his pate with unwashable ink, and then
letting the hair grow back before dispatching him to the destination
(example from history). To take an
example from modern digital techniques, one could put the text of a message
in the blank spaces in an image file.

USAGE:

“Using steganography, Steve was able to hide his message in the
photographs he took that day.”
Andre Le Gallo; The Caliphate; D Street Books; 2012.